
Hi @mikemaccarthy ,
Could you please share a bit more about your issue?
Do you mean that the Sum function always works well in web browser, but not in iOS device?
Could you please show more details about the Time column in your Table1? Is it a Number type column?
Based on the issue that you mentioned, I have made a test on my side, and don't have the issue that you mentioned. Please make sure the version of PowerApps Mobile App in your iOS device is the latest version, if not, please consider upgrade it to latest version firstly.
In addition, please consider take a try with the following formula (ForAll function) in your app instead of the Sum(...) formula:
Sum(
ForAll(
Filter(Search(Table1, TextInput2_1.Text, "Technician"), Status = "Complete"),
Time
),
Value
)
Also please consider take a try to turn off the "Improved app rendering (final validation)" option within Advanced settings of App settings of your app, and set the "Data row limit for Non-delegable queries" option to maximum value -- 2000, then try above formula again, check if the issue is solved.
Best regards,